Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5eb0f8c9c64d83a…

MALICIOUS

PDF

95.7 KB Created: 2021-09-01 08:24:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: be63f9f38ebf005ef7137256eec8c44f SHA-1: 706edb632ab13da81dc415ef8dcfb43834beb401 SHA-256: f5eb0f8c9c64d83a8c630463ec6319fdff01a87606d4eced249e0777c9a2848f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress installations and disposable hosting. These links likely serve as lures for phishing attacks or to distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9529

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b57487aa66f---88441846422.pdf In PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae54183da27---periz.pdfIn PDF document text
    • http://xn----7sbicwad4afgcgd5aph7d5e.xn--p1ai/ckfinder/userfiles/files/22583440626.pdfIn PDF document text
    • https://perfecthospitals.org/ckfinder/userfiles/files/fabosabogaxiwemobaxoka.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aeba33dbf7---kepesa.pdfIn PDF document text
    • http://commandhousecreations.com/uploads/files/70990978235.pdfIn PDF document text
    • http://mkconline.com/landmark/ckfinder/userfiles/files/gulebezibuv.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee8705feb9---zevagujemifapome.pdfIn PDF document text
    • http://blueyee.com/upload/file/222334382385.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/27956014293.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16079255552980---fubizasovexumawabanut.pdfIn PDF document text
    • http://airfa.it/userfiles/file/wotokimerupab.pdfIn PDF document text
    • http://levakov132.ru/userfiles/file/92745735204.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16070197a4c051---27493185723.pdfIn PDF document text
    • http://birizgardenhotel.com/userfiles/file/gojazisoditus.pdfIn PDF document text
    • http://tindangnhadat.vn/upload/files/viromotisuvuguvazanenanur.pdfIn PDF document text
    • http://kaies.cn/upfiles/file/tabiliziji.pdfIn PDF document text
    • https://rpdev.org/ckfinder/userfiles/files/72260951797.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/biivtigmk4msqklksrn5k9jkp5/10318708135.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1609049c5e61dc---vogokadaxilujo.pdfPDF link annotation
    • https://www.moxiclear.com.au/application/third_party/ckfinder/userfiles/files/5451392429.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a00c51b4ae2---danok.pdfIn PDF document text
    • http://sakem.org/userfiles/files/66897582244.pdfIn PDF document text
    • http://dralituncer.net/userfiles/file/1889797013.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/d156558fdc8408dab452a60679f898b3/pexeva.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=amniocentesis+is+a+method+used+to+determine+thePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000115e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115E2 10672 bytes
SHA-256: 8c969457e992dac156b0a61d2d2159285bb1c9ae13674a1d953b2def08fce3ce
font_01_sfnt_off00012e24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E24 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14636 19408 bytes
SHA-256: 08f924dc497345c8fc1c0f8a04885c88c520cc9800b53e5dd8e841494d468635

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